package common;

/**
 * @Author Big_white
 * @Date 2021/11/26
 */
public abstract class Duck {
    public Duck() {
    }
    public abstract void display();//显示鸭子信息
    public void quack(){
        System.out.println("鸭子嘎嘎叫--");
    }
    public void swim(){
        System.out.println("鸭子会游泳--");
    }
    public void fly(){
        System.out.println("鸭子会飞翔--");
    }
}
